Year	U.S. dollars (Billions)
1980	8.850
1981	10.026
1982	9.616
1983	9.692
1984	10.243
1985	10.698
1986	13.945
1987	16.152
1988	16.403
1989	14.626
1990	14.641
1991	16.325
1992	14.963
1993	15.611
1994	10.622
1995	10.075
1996	11.227
1997	11.352
1998	11.338
1999	11.553
2000	10.245
2001	10.950
2002	12.369
2003	15.944
2004	18.803
2005	19.534
2006	20.912
2007	23.931
2008	27.712
2009	27.903
2010	27.530
2011	30.626
2012	30.174
2013	33.729
2014	36.396
2015	32.213
2016	33.805
2017	36.086
2018	39.992
2019	39.673
2020	40.863
2021	45.391
2022	44.508
2023	48.958
2024	53.205
2025	57.661
2026	61.828
2027	66.137
2028	70.232
2029	74.693